Composure (brand names: Composure, Composure Pro) is an over‑the‑counter calming supplement for cats. Its active ingredients are colostrum calming complex, L‑theanine, and thiamine (vitamin B1); some Pro versions also include L‑tryptophan. It is not a prescription medication.
Commonly used for situational stress and mild anxiety in cats, such as vet or grooming visits, travel/boarding, fireworks/thunderstorms, changes in routine, or multi‑cat household tension. Your veterinarian can discuss whether this supplement is appropriate for your cat and what other behavior strategies or treatments may be needed.
Front desk script: Composure is an over‑the‑counter calming supplement for cats. It uses colostrum calming complex, L‑theanine, and thiamine to help with mild stress—things like vet visits, travel, fireworks, or multi‑cat tension. There are different versions, and some add L‑tryptophan. If the owner wants guidance on whether it’s right for their cat or how to use it with their cat’s specific behavior plan, I can connect them with our veterinarian.
Common owner questions and quick answers:
- What is Composure and how fast does it work? Composure is a non‑prescription calming supplement for cats that combines L‑theanine, thiamine (vitamin B1), and a colostrum‑derived calming complex. Per the manufacturer, it typically starts helping in about 30 minutes and may last a few hours; it’s designed to promote relaxation without sedation. These are supplements, not FDA‑approved drugs for effectiveness. Your veterinarian can advise whether it fits your cat’s overall plan.
- Is it safe—what side effects should I watch for? Most cats tolerate calming supplements well, but any supplement can cause stomach upset or, rarely, allergic reactions. Stop the product and contact a veterinarian right away for vomiting or diarrhea that doesn’t resolve, hives, facial swelling, trouble breathing, severe weakness, collapse, or seizures—these are emergencies. Use caution in pregnant or nursing pets and in cats with significant behavior concerns; your veterinarian can guide you.
- Can it be used with my cat’s other medications? It depends. L‑theanine may interact with blood‑pressure medications and other products. Always tell your veterinarian about all meds and supplements your cat takes; don’t add or remove anything without veterinary guidance.
- Does it really help with stress or anxiety? Results vary. An open‑label (uncontrolled) study in 33 cats found behavior improvements over 2–4 weeks with L‑theanine, but stronger studies are needed. Calming supplements work best as part of a broader plan (environmental changes, behavior guidance); your veterinarian can discuss options, including prescription therapies if needed.
- When should I call the vet instead of using a calming treat? Same‑day care is warranted for red flags like not eating for 24 hours, hiding and not drinking, pain, or blood in the urine. Go to emergency care now for breathing difficulty, collapse, seizures, or facial swelling. Your veterinary team can help decide next steps.
Front desk script: Composure is a calming supplement for cats that may start helping in about 30 minutes and isn’t meant to sedate. It’s generally well tolerated, but if you see facial swelling, trouble breathing, collapse, or seizures, please go to the emergency clinic now. Because supplements can interact with other medications, I recommend checking with our veterinarian before you add or change anything. If your cat’s stress behaviors are ongoing, I can book an appointment so our doctor can go over a full behavior plan and other options.
What owners most often report: most cats tolerate Composure well. The most common call-backs are about mild stomach/GI upset—soft stool, gassiness, or an occasional vomit—especially if a cat ate more chews than planned. True drug‑like sedation isn’t expected with L‑theanine–based calming products; a calmer or slightly quieter cat can be normal.
Call the clinic the same day if: vomiting or diarrhea happens more than once, lasts beyond about 24 hours, there’s a marked drop in appetite, your cat seems unusually sleepy or wobbly, or you notice behavior changes (restlessness, agitation, or new aggression). Let us know if your cat takes blood‑pressure medicine or other supplements, because L‑theanine may interact with some products; your veterinarian can discuss what to watch for and next steps.
Escalate immediately if you see signs of an allergic reaction or severe illness: facial swelling, hives, trouble breathing, collapse, or repeated vomiting/diarrhea (with or without blood). These are emergencies and need prompt veterinary care. Your veterinarian can discuss whether this supplement is appropriate and how to proceed after any adverse signs.
Front desk script: Thanks for calling—most cats do fine on Composure, but a few get mild stomach upset like soft stool or a single vomit, especially if extra chews were eaten. It isn’t meant to make cats drowsy; if your cat is very sleepy, wobbly, or not acting right, or if vomiting/diarrhea happens more than once or lasts into tomorrow, I’ll alert our veterinarian to advise you. If you see facial swelling, hives, trouble breathing, collapse, or repeated vomiting/diarrhea, please go to the nearest emergency clinic now. Also, let me know if your cat is on blood‑pressure medication or other supplements so our veterinarian can review for interactions.
Forms and basics: Composure for Cats is most commonly a soft chew. A veterinary‑strength liquid version (formerly Composure Pro Liquid; now “Veterinary Strength Calm & Confident Liquid”) is also available for cats and dogs and includes an oral syringe for easier giving. Both forms may be given with food; administering during or after a meal can help reduce stomach upset.
Administration tips: For chews, offer as a treat, break into small pieces, or crumble into a small spoonful of strong‑smelling wet food or treat puree; try right before a regular meal so your cat is hungry. For liquid, slowly place the dose into the cheek pouch with the provided syringe or mix into a small amount of food. If you need hands‑on technique help (towel “purrito,” safe mouth positioning, offering a small amount of water afterward for tablets), ask the care team to demonstrate or see Cornell’s step‑by‑step guide. Your veterinarian can discuss alternatives if these approaches aren’t working.
Troubleshooting and escalation: If your cat vomits after a dose, give future doses with a small meal and monitor. If vomiting happens more than once, there’s diarrhea or marked lethargy, or you see hives, facial swelling, pale gums, or any trouble breathing, seek emergency veterinary care immediately. If your cat refuses the chew or liquid entirely, your veterinarian can discuss other calming options or a referral to a compounding pharmacy for cat‑friendly flavored forms.
Front desk script: This calming supplement usually comes as a soft chew; there’s also a vet‑formulated liquid if a chew won’t work. Try giving the chew like a treat or crumbled into a spoonful of wet food; for the liquid, use the syringe and give it during or right after a meal. If your cat vomits more than once, or you ever see facial swelling or trouble breathing, that’s an emergency—go to the nearest ER and call us on the way. If it’s still hard to give, our veterinarian can talk through other options or a compounded flavored form.
Composure (colostrum calming complex + L-theanine + thiamine) is a non-prescription calming supplement for cats sold under Composure and Composure Pro branding; the manufacturer now also markets this formula as Veterinary Strength Calm & Confident for Cats. Because it is a supplement and not an FDA-approved prescription drug, no prescription is required to sell or dispense it.
Refill/purchase workflow: Treat requests like a retail product request. Collect: pet and owner identifiers (pet name, client name, phone/email), exact product requested (Composure vs Composure Pro; count/size/flavor), how many chews remain, preferred pickup/ship option, and any recent changes (new medications, new health concerns, or any adverse signs). There is no legal re-exam requirement to sell this supplement; however, route to a veterinarian if the owner reports new or worsening anxiety, unexpected sedation, GI upset, the cat is on other medications, or there are chronic conditions—your veterinarian can advise whether a recheck is appropriate and if this product still fits the care plan.
Turnaround and frequency: If in stock, same-day pickup is typical; if not, advise standard clinic ordering timelines. There is no standard “refill” interval—clients purchase as needed based on usage and package size; document the client’s preferred supply (e.g., number of chews or packs) in the chart. Online pharmacy/store: since no prescription is required, clients can order directly through the clinic’s online store; if a third-party site requests clinic approval, acknowledge it and the team can respond within one business day to avoid delays. Escalate immediately to a veterinarian or emergency care if the caller reports collapse, seizures, trouble breathing, severe vomiting/diarrhea, or sudden difficulty walking.
Front desk script: “Composure is an over-the-counter calming supplement for cats, so we can handle it like a retail purchase. To get this ready, may I confirm your cat’s name, the specific product (Composure or Composure Pro), the package size/flavor you want, how many you have left, and whether you prefer pickup or online ordering? If you’ve noticed new symptoms or your cat started any new medications, I’ll have our veterinarian review and we’ll follow up—if you report collapse, seizures, trouble breathing, or severe vomiting, please seek emergency care now and I’ll alert our doctor. Otherwise, if it’s in stock we can have it ready today; if we need to order or approve an online request, we’ll update you within one business day.”
Escalate to a veterinarian or tech immediately if the cat shows signs of a severe allergic reaction after a dose: sudden facial swelling, hives, repeated vomiting or diarrhea, drooling, trouble breathing, very pale gums, collapse, or seizures. Treat breathing difficulty or collapse as an emergency without delay. These can occur with any supplement and have been reported in cats during anaphylaxis.
Also escalate promptly if there was a possible overdose (e.g., the cat ate an unknown/large number of chews) or if the cat develops concerning effects such as persistent vomiting or diarrhea, extreme lethargy, marked weakness, wobbliness, or fainting. L‑theanine can interact with blood‑pressure–lowering drugs, and colostrum is a milk‑derived ingredient; cats with milk allergy may show itching, stomach upset, or swelling. Safety in pregnant/breeding animals is not established for these products—your veterinarian can advise on suitability and next steps. In any suspected overdose, contact a veterinary professional immediately.
Front desk script: Because you’re seeing those signs, this could be an emergency. I’m alerting our medical team now—please stay on the line. If your cat has trouble breathing, collapses, or the face is swelling, go to the nearest emergency hospital right away. If your cat may have eaten a lot of Composure chews, we need a veterinarian to guide you now.
Composure for Cats (colostrum calming complex + L-theanine + thiamine) is a nonprescription calming supplement. Front-desk goal: when an owner mentions other meds or human OTCs, note them and flag the chart so a veterinarian can confirm they’re safe together.
Commonly paired prescription meds to listen for: gabapentin, trazodone, alprazolam (often used for vet-visit stress), fluoxetine (behavior), and amlodipine (for high blood pressure). Key interaction categories: blood-pressure medicines—L-theanine can lower blood pressure, so flag if the cat is on amlodipine or other antihypertensives; a veterinarian should advise. Nutrient–drug: thiamine (vitamin B1) can be affected by amprolium and may interact with fluorouracil; mention these if the owner brings them up. Combining multiple calming/sedating therapies (e.g., Composure plus prescription anxiolytics) can change a cat’s alertness; your veterinarian can discuss whether to use them together and how to time doses for that pet.
Human OTCs owners commonly give: diphenhydramine/Benadryl (can cause drowsiness and interacts with other CNS depressants), CBD products (may cause lethargy and can interact with benzodiazepines, gabapentin, tramadol, and other drugs), and melatonin (can cause sleepiness). If any of these are used with Composure, collect exact product names and route to a veterinarian before advising further. Urgent red flags requiring immediate veterinary care: severe or worsening lethargy, stumbling/collapse, trouble breathing, facial swelling/hives, or seizures; if these occur, direct the owner to an emergency clinic now.
Front desk script: Thanks for letting me know you’re using Composure. Because it contains L‑theanine and vitamin B1, I just need to check what other medications or supplements your cat is on—things like gabapentin, trazodone or alprazolam, fluoxetine, or blood-pressure meds such as amlodipine. Are you also giving any human over‑the‑counter products like Benadryl, CBD, or melatonin? I’ll add this to your chart so our veterinarian can confirm everything is safe together for your cat. If you notice extreme sleepiness, wobbliness, trouble breathing, facial swelling, or a seizure, please go to the nearest emergency vet right away.
Store Composure chews in their original, tightly closed container in a cool, dry place, away from heat, humidity, and direct sunlight. Refrigeration is not required unless the package specifically says so. When properly stored, VetriScience supplements remain shelf‑stable until the printed expiration date even after opening; do not use past that date—check the lot/exp date on the package. If a product was exposed to extreme heat/cold or looks or smells off, pause dispensing and ask the veterinarian how to proceed.
Keep out of reach of children and other pets (the chews are palatable). Not for human consumption. In case of an accidental overdose or if a child or another pet eats more than intended, contact a veterinarian or an emergency/poison control service right away. Your veterinarian can discuss what to watch for and next steps based on the amount ingested and the pet’s health status.
Disposal: Prefer drug take‑back options. If none are available, place unused/expired chews in the household trash by mixing them (do not crush) with an unappealing substance like used coffee grounds or cat litter, seal in a bag/container, and discard; remove personal information from packaging. Do not flush medications unless a product specifically appears on the FDA Flush List. If you have disposal questions, your veterinarian can advise on local take‑back programs or pharmacy options.
For healthy cats taking Composure (colostrum calming complex + L‑theanine + thiamine), routine lab work is not typically required. At home, ask owners to monitor behavior (anxiety signs, settling, interactions) and any side effects. L‑theanine resources note that home monitoring is the main follow‑up and that the veterinarian will advise when to reassess; if the pet’s condition does not improve within about 60 days, a recheck with the veterinarian is recommended. The product is described as fast‑acting (often within ~30 minutes) with effects that may last several hours, so owners can often gauge short‑term response and report back. Your veterinarian can discuss whether any medical conditions or other medications mean additional monitoring is needed and set the specific recheck timeline for that patient.
Scheduling guidance for front office: offer a non‑urgent progress check with the veterinarian to review response and any behavior notes, especially if the cat is also on other behavior medications or has liver/kidney disease. Emphasize that the veterinarian will individualize any monitoring and that no blood tests are planned unless the doctor advises.
Escalation: if owners report facial swelling, hives, trouble breathing, collapse, severe lethargy, stumbling/ataxia, or repeated vomiting/diarrhea after giving the supplement, advise immediate emergency care. For milder concerns (reduced appetite, soft stool, unusual behavior), arrange a same‑week callback or appointment with the veterinarian.
Front desk script: This calming supplement usually shows effects within about 30 minutes and can last a few hours. Please keep a simple behavior log and call us if you don’t see any improvement by around 60 days, or sooner if you have concerns—our veterinarian can review how it’s going and advise on next steps. We don’t schedule routine bloodwork for this supplement unless your veterinarian requests it. If you notice facial swelling, trouble breathing, collapse, or repeated vomiting/diarrhea, please seek emergency care right away and let us know.
Composure for Cats is an over‑the‑counter calming supplement for feline stress made with colostrum calming complex, L‑theanine, and thiamine (vitamin B1). It’s intended to support relaxation during common stressors like travel, vet visits, or routine changes. The manufacturer recently rebranded the Composure line as Calm & Confident; the standard cat formula and ingredients remain the same, so clients may see either name on the package. Your veterinarian can discuss whether this supplement fits a cat’s overall behavior plan or current medications.
Safety notes you can share: supplements are not FDA‑approved for effectiveness, and individual responses vary. Mild stomach upset can occur with oral supplements; stop the product and call us if anything unusual is noted. Seek immediate emergency care for red‑flag reactions such as facial swelling, hives, trouble breathing, collapse, or seizures, and contact ASPCA Animal Poison Control at 888‑426‑4435 if a large or unintended amount was eaten. For cats with severe anxiety, aggression, or multiple medications, your veterinarian should advise next steps.
Phrases to avoid: "This will cure anxiety," "It’s safe for all cats," "Just start/stop other meds," or any dose guidance (including "double/triple a dose"). Instead say, "Follow the label and your veterinarian’s directions."
Front desk script: “Thank you for calling [Clinic], this is [Name]. Composure for Cats is an over‑the‑counter calming supplement with colostrum peptides, L‑theanine, and vitamin B1 to help with everyday stress; it was recently renamed Calm & Confident, but it’s the same standard formula. Because every cat and medication plan is different, your veterinarian can advise if this is appropriate with your cat’s behavior and any current meds—would you like me to get a medical team member or schedule a quick consult? If you see facial swelling, hives, trouble breathing, collapse, or seizures after any product, please head to the nearest emergency clinic now and call us on the way; for large or unexpected ingestions, you can also call ASPCA Animal Poison Control at 888‑426‑4435. Otherwise, I can arrange a same‑day nurse call or the next available appointment—what works best for you?”